Daily Practice

Foundation

10th August 2026

5 questions · Foundation tier · 282 questions in this band

1
Experimental Design
What is a control group used for?
2
Median Quartiles and IQR
A data set has Q1 = 22 and Q3 = 35. State the interquartile range and explain what it measures.
3
Index Numbers
An index number is 140 with a base value of 20. Find this year's value.
4
Frequency Tables and Tally Charts
Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
5
Time Series and Moving Averages
Find the 3-point moving average of 14, 18, 20.

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